Opinions from M. G. Bassett and L. R. M. Cocks 1974
- 'Acrospiriferinae belongs to Delthyrididae'
- 'Aegiria belongs to Aegiromeninae'
- 'Aegiromeninae belongs to Sowerbyellidae'
- 'Amphistrophia belongs to Stropheodontidae'
- 'Anastrophia belongs to Parastrophinidae'
- 'Ancillotoechia belongs to Trigonirhynchiidae'
- 'Anomia biloba is recombined as Dicoelosia biloba'
- 'Anomia bilocularis is recombined as Conchidium biloculare'
- 'Anomia crispa is recombined as Striispirifer crispus'
- 'Anomia lacunosa is a subjective synonym of Sphaerirhynchia wilsoni'
- 'Anomia pecten is recombined as Coolinia pecten'
- 'Anomia plicatella is recombined as Striispirifer plicatellus'
- 'Anomia reticularis is recombined as Atrypa reticularis'
- 'Anomites exporrectus is recombined as Cyrtia exporrecta'
- 'Anomites rhomboidalis is recombined as Leptaena rhomboidalis'
- 'Anomites transversalis is recombined as Eoplectodonta transversalis'
- 'Anoplothecidae belongs to Dayiacea'
- 'Antirhynchonella belongs to Clorindinae'
- 'Athyrididae belongs to Athyridacea'
- 'Atrypa belongs to Atrypinae'
- 'Atrypa (Gotatrypa) hedei is recombined as Atrypa hedei' according to Struve 1966
- 'Atrypa coralifera is recombined as Dictyonella coralifera'
- 'Atrypa dormitzeri belongs to Atrypa' according to Barrande 1879
- 'Atrypa galeata is recombined as Gypidula galeata'
- 'Atrypa hemisphaerica is recombined as Eocoelia hemisphaerica'
- 'Atrypa linguifera is recombined as Antirhynchonella linguifera'
- 'Atrypa nitida is recombined as Whitfieldella nitida'
- 'Atrypa obovata is recombined as Glassia obovata'
- 'Atrypa obtusa is recombined as Meristina obtusa' according to Dalman 1828
- 'Atrypa obtusa is recombined as Meristina obtusa'
- 'Atrypa prunum is recombined as Atrypella prunum'
- 'Atrypa reticularis alata belongs to Atrypa reticularis' according to Hisinger 1831
- 'Atrypidae belongs to Atrypacea'
- 'Atrypina belongs to Atrypininae'
- 'Atrypinae belongs to Atrypidae'
- 'Atrypinae margaritoides belongs to Atrypinae' according to Rzhonsnitskaya 1964
- 'Atrypinae margaritoides is replaced by Spinatrypina margaritoides'
- 'Atrypininae belongs to Atrypidae'
- 'Bilobites verneuilianus is recombined as Dicoelosia verneuiliana'
- 'Boucotinskia belongs to Kozlowskiellininae'
- 'Boucotinskia elongata belongs to Boucotinskia' according to Munthe 1910
- 'Boucotinskia elongata insignis belongs to Boucotinskia elongata' according to Hedström 1923
- 'Brachyprion belongs to Stropheodontidae'
- 'Camarotoechiidae belongs to Rhynchonellacea'
- 'Camarotoechiinae belongs to Camarotoechiidae'
- 'Camerella belongs to Camerellinae'
- 'Camerellidae belongs to Porambonitacea'
- 'Camerellinae belongs to Camerellidae'
- 'Cardium multisulcatum is a subjective synonym of Costistricklandia lirata lirata'
- 'Carinatininae belongs to Atrypidae'
- 'Chilidiopsidae belongs to Davidsoniacea'
- 'Chonetes cingulata is recombined as Strophochonetes cingulatus'
- 'Chonetidae belongs to Chonetacea'
- 'Clorinda belongs to Clorindinae'
- 'Clorindinae belongs to Pentameridae'
- 'Coelospira belongs to Coelospirinae'
- 'Coelospirinae belongs to Anoplothecidae'
- 'Conchidium belongs to Pentameridae'
- 'Coolinia belongs to Chilidiopsidae'
- 'Costistricklandia belongs to Stricklandiidae'
- 'Costistricklandia lirata belongs to Costistricklandia' according to Sowerby 1839
- 'Costistricklandia lirata lirata belongs to Costistricklandia lirata' according to Sowerby 1839
- 'Cyphomena (Cyphomenoidea) is corrected as Cyphomena (Cyphomenoides) and belongs to Leptaeninae'
- 'Cyrtia belongs to Cyrtiinae'
- 'Cyrtiidae belongs to Cyrtiacea'
- 'Cyrtiinae belongs to Cyrtiidae'
- 'Dalejina belongs to Rhipidomellinae'
- 'Dalmanella (Isorthis) szajnochai is recombined as Isorthis szajnochai'
- 'Dalmanella conservatrix is recombined as Salopina conservatrix'
- 'Dalmanellidae belongs to Enteletacea'
- 'Dayia belongs to Dayiinae'
- 'Dayiidae belongs to Dayiacea'
- 'Dayiinae belongs to Dayiidae'
- 'Delthyrididae belongs to Spiriferacea'
- 'Delthyridinae belongs to Delthyrididae'
- 'Delthyris belongs to Delthyridinae'
- 'Delthyris cyrtaena is a subjective synonym of Striispirifer plicatellus'
- 'Delthyris elegans belongs to Delthyris' according to Muir-Wood 1925
- 'Delthyris elevata belongs to Delthyris' according to Dalman 1828
- 'Delthyris niagarensis is recombined as Striispirifer niagarensis'
- 'Delthyris ptychodes belongs to Delthyris' according to Dalman 1828
- 'Delthyris pusio belongs to Delthyris' according to Hisinger 1831
- 'Delthyris sulcata is recombined as Boucotinskia sulcata'
- 'Desquamatia khavae belongs to Desquamatia' according to Alekseeva 1960
- 'Dicoelosia belongs to Dicoelosiidae'
- 'Dicoelosiidae belongs to Enteletacea'
- 'Dictyonella belongs to Eichwaldiidae'
- 'Didymothyris belongs to Protathyridinae'
- 'Dolerorthidae belongs to Orthacea'
- 'Dolerorthinae belongs to Dolerorthidae'
- 'Dolerorthis belongs to Dolerorthinae'
- 'Draboviinae belongs to Schizophoriidae'
- 'Eichwaldiidae belongs to Eichwaldiacea'
- 'Eocoelia belongs to Leptocoeliidae'
- 'Eocoelia angelini belongs to Eocoelia' according to Lindström 1861
- 'Eoplectodonta belongs to Sowerbyellinae'
- 'Eospirifer belongs to Eospiriferinae'
- 'Eospirifer radiatus globosus belongs to Eospirifer radiatus' according to Salter 1848
- 'Eospiriferinae belongs to Cyrtiidae'
- 'Ferganella turkestanica belongs to Ferganella' according to Nikiforova 1937
- 'Glassia belongs to Lissatrypidae'
- 'Glassina belongs to Protathyridinae'
- 'Glyptorthinae belongs to Dolerorthidae'
- 'Gypidula belongs to Gypidulinae'
- 'Gypidulinae belongs to Pentameridae'
- 'Hebetoechiinae belongs to Uncinulidae'
- 'Hedeina is a subjective synonym of Macropleura'
- 'Hesperorthinae belongs to Dolerorthidae'
- 'Hesperorthis belongs to Hesperorthinae'
- 'Hindellinae belongs to Meristellidae'
- 'Homoeospira belongs to Rhynchospirinidae'
- 'Howellella belongs to Acrospiriferinae'
- 'Howellella elegans belongs to Howellella' according to Muir-Wood 1925
- 'Isorthinae belongs to Dalmanellidae'
- 'Isorthis belongs to Isorthinae'
- 'Isorthis slitensis belongs to Isorthis' according to Walmsley 1965
- 'Janius belongs to Eospiriferinae'
- 'Katastrophomena belongs to Strophomeninae'
- 'Kirkidium belongs to Pentamerinae'
- 'Kozlowskiella strawi is recombined as Kozlowskiellina strawi'
- 'Kozlowskiellina belongs to Kozlowskiellininae'
- 'Kozlowskiellininae belongs to Delthyrididae'
- 'Leangella belongs to Leptestiininae'
- 'Lepidoleptaena belongs to Leptaeninae'
- 'Leptaena belongs to Leptaeninae'
- 'Leptaena duvalii is recombined as Eoplectodonta duvalii'
- 'Leptaena euglypha is recombined as Strophomena euglypha' according to Davidson 1871
- 'Leptaena euglypha is recombined as Strophonella (Strophonella) euglypha'
- 'Leptaena grayi is recombined as Aegiria grayi'
- 'Leptaena laevigata is recombined as Pholidostrophia (Mesopholidostrophia) laevigata'
- 'Leptaena loveni is recombined as Pentlandina loveni'
- 'Leptaena minima is recombined as Protochonetes minimus'
- 'Leptaena segmentum is recombined as Leangella segmentum'
- 'Leptaeninae belongs to Strophomenidae'
- 'Leptaenoidea belongs to Leptaenoideinae'
- 'Leptaenoideidae was reranked as a subfamily and belongs to Strophomenidae'
- 'Leptaenoideinae belongs to Strophomenidae'
- 'Leptellinidae belongs to Plectambonitacea'
- 'Leptestiininae belongs to Leptellinidae'
- 'Leptocoelia concava is recombined as Coelospira concava'
- 'Leptocoelia imbricata is recombined as Atrypina imbricata'
- 'Leptocoeliidae belongs to Dayiacea'
- 'Leptostrophia belongs to Stropheodontidae'
- 'Liljevallia belongs to Stropheodontidae'
- 'Linoporella belongs to Linoporellidae'
- 'Linoporellidae belongs to Enteletacea'
- 'Lissatrypa belongs to Lissatrypinae'
- 'Lissatrypidae belongs to Atrypacea'
- 'Lissatrypinae belongs to Lissatrypidae'
- 'Lissostrophia (Mesolissostrophia) pellucida belongs to Lissostrophia (Mesolissostrophia)' according to Williams 1950
- 'Pholidostrophia (Mesopholidostrophia) pellucida is a subjective synonym of Pholidostrophia (Mesopholidostrophia) laevigata'
- 'Merista tumida is a subjective synonym of Meristina obtusa'
- 'Meristella maria is recombined as Meristina maria'
- 'Meristellidae belongs to Athyridacea'
- 'Meristellinae belongs to Meristellidae'
- 'Meristina belongs to Meristellinae'
- 'Mesolissostrophia was reranked as Lissostrophia (Mesolissostrophia) and belongs to Lissostrophia' according to Williams 1950
- 'Microsphaeridiorhynchus belongs to Trigonirhynchiidae'
- 'Morinorhynchus belongs to Chilidiopsidae'
- 'Nucleospira belongs to Nucleospiridae'
- 'Nucleospiridae belongs to Athyridacea'
- 'Oligorhynchiidae belongs to Rhynchonellacea'
- 'Orthis acuta is recombined as Skenidioides acutum'
- 'Orthis applanata is recombined as Coolinia applanata'
- 'Orthis basalis is recombined as Resserella basalis'
- 'Orthis bouchardi is recombined as Ptychopleurella bouchardi'
- 'Orthis canaliculata is recombined as Isorthis canaliculata'
- 'Orthis canalis is recombined as Resserella canalis'
- 'Orthis crassa is recombined as Isorthis crassa'
- 'Orthis davidsoni is recombined as Hesperorthis davidsoni'
- 'Orthis elegantula is recombined as Resserella elegantula'
- 'Orthis filosa is recombined as Leptostrophia filosa'
- 'Orthis funiculata is recombined as Amphistrophia funiculata'
- 'Orthis hybrida is recombined as Dalejina hybrida'
- 'Orthis interplicata is recombined as Dolerorthis interplicata'
- 'Orthis lewisii is recombined as Skenidioides lewisii'
- 'Orthis loveni is recombined as Isorthis loveni'
- 'Orthis lunata is recombined as Salopina lunata'
- 'Orthis punctata is recombined as Linoporella punctata'
- 'Orthis pusilla is recombined as Coelospira pusilla'
- 'Orthis rustica is recombined as Dolerorthis rustica'
- 'Orthis striatella is recombined as Protochonetes striatellus'
- 'Orthis tricenaria is recombined as Hesperorthis tricenaria'
- 'Orthis tubulata is recombined as Salopina tubulata'
- 'Orthis visbyensis is recombined as Visbyella visbyensis'
- 'Orthotetes adnata is recombined as Morinorhynchus adnatus'
- 'Parastrophinidae belongs to Porambonitacea'
- 'Pentameridae belongs to Pentameracea'
- 'Pentamerinae belongs to Pentameridae'
- 'Pentamerus belongs to Pentamerinae'
- 'Pentamerus gothlandicus belongs to Pentamerus' according to Lebedev 1892
- 'Pentamerus knappi is recombined as Rhipidium knappi'
- 'Pentamerus knightii is recombined as Kirkidium knightii'
- 'Pentamerus rotundus is recombined as Clorinda rotunda'
- 'Pentamerus sculptus is recombined as Kirkidium sculptum'
- 'Pentamerus tenuistratus is recombined as Rhipidium tenuistriatum'
- 'Pentamerus verneuili is recombined as Anastrophia verneuili'
- 'Pentlandina belongs to Strophomeninae'
- 'Pholidostrophia (Mesopholidostrophia) nitens is a subjective synonym of Pholidostrophia (Mesopholidostrophia) laevigata'
- 'Plagiorhyncha belongs to Camarotoechiinae'
- 'Platystrophia belongs to Platystrophiinae'
- 'Platystrophiinae belongs to Plectorthidae'
- 'Plectatrypa belongs to Carinatininae'
- 'Plectatrypa lamellosa belongs to Plectatrypa' according to Lindström 1861
- 'Plectorthidae belongs to Orthacea'
- 'Plectotreta belongs to Triplesidae'
- 'Plectotreta lindstroemi belongs to Plectotreta' according to Ulrich and Cooper 1936
- 'Producta depressa is recombined as Leptaena depressa'
- 'Protathyridinae belongs to Athyrididae'
- 'Protochonetes belongs to Chonetidae'
- 'Protochonetes ludloviensis belongs to Protochonetes' according to Muir-Wood 1962
- 'Protozeuga belongs to Dayiinae'
- 'Ptychopleurella belongs to Glyptorthinae'
- 'Resserella belongs to Resserellinae'
- 'Resserellinae belongs to Dalmanellidae'
- 'Rhipidium belongs to Pentamerinae'
- 'Rhipidomellidae belongs to Enteletacea'
- 'Rhipidomellinae belongs to Rhipidomellidae'
- 'Rhipidomelloides phaseola is recombined as Dalejina phaseola'
- 'Rhynchonella ancillans is recombined as Ancillotoechia ancillans'
- 'Rhynchonella exigua belongs to Rhynchonella' according to Lindström 1861
- 'Rhynchonella glassii is recombined as Plagiorhyncha glassii'
- 'Rhynchonella litchfieldensis is recombined as Microsphaeridiorhynchus litchfieldensis'
- 'Rhynchospira evax is recombined as Homoeospira evax'
- 'Rhynchospirinidae belongs to Retziacea'
- 'Rhynchotrematidae belongs to Rhynchonellacea'
- 'Rhynchotrematinae belongs to Rhynchotrematidae'
- 'Rhynchotreta belongs to Oligorhynchiidae'
- 'Salopina belongs to Draboviinae'
- 'Schizophoriidae belongs to Enteletacea'
- 'Schizoramma gotlandica is recombined as Hesperorthis gotlandica'
- 'Septatrypinae belongs to Lissatrypidae'
- 'Skenidiidae belongs to Orthacea'
- 'Skenidioides belongs to Skenidiidae'
- 'Sowerbyella precursor is recombined as Eoplectodonta precursa'
- 'Sowerbyellidae belongs to Plectambonitacea'
- 'Sowerbyellinae belongs to Sowerbyellidae'
- 'Sphaerirhynchia belongs to Hebetoechiinae'
- 'Spinatrypa belongs to Atrypinae'
- 'Spinatrypina belongs to Atrypinae'
- 'Spinatrypina margaritoides belongs to Spinatrypina' according to Rzhonsnitskaya 1964
- 'Spinatrypina tubulosa belongs to Spinatrypina'
- 'Spirifer barrandi is recombined as Janius barrandi'
- 'Spirifer deltidialis is recombined as Kozlowskiellina deltidialis'
- 'Spirifer insignis belongs to Spirifer' according to Hedström 1923
- 'Spirifer insignis minor is a subjective synonym of Boucotinskia elongata'
- 'Spirifer marklini is recombined as Eospirifer marklini'
- 'Spirifer nobilis is recombined as Janius nobilis'
- 'Spirifer plicatus is a subjective synonym of Costistricklandia lirata lirata'
- 'Spirifer radiatus is recombined as Eospirifer radiatus'
- 'Spirifer subinsignis is recombined as Howellella subinsignis'
- 'Spirifer ventricosus is recombined as Nucleospira ventricosus'
- 'Janius schmidti is a subjective synonym of Janius barrandi'
- 'Spirifera striolata is recombined as Striispirifer striolatus'
- 'Spirigerina belongs to Carinatininae'
- 'Spirigerina cordata is recombined as Plagiorhyncha cordata'
- 'Spirigerina quinquecostata belongs to Spirigerina' according to Munthe 1910
- 'Spirigerina sulcata is recombined as Lissatrypa sulcata'
- 'Streptis belongs to Triplesiidae'
- 'Stricklandiidae belongs to Pentameracea'
- 'Striispirifer belongs to Eospiriferinae'
- 'Striispirifer interlineatus is a subjective synonym of Striispirifer plicatellus'
- 'Striispirifer sinuosus is a subjective synonym of Striispirifer plicatellus'
- 'Strophochonetes belongs to Chonetidae'
- 'Strophomena crispa is recombined as Morinorhynchus crispus'
- 'Strophomena leda is recombined as Brachyprion leda'
- 'Strophomena rugata is recombined as Leptaena rugata'
- 'Strophomena semifasciata is recombined as Strophonella semifasciata'
- 'Strophomena semiglobosa is recombined as Megastrophia (Protomegastrophia) semiglobosa'
- 'Strophomena semiglobosa is recombined as Megastrophia (Protomegastrophia) semiglobosa' according to Bassett 1971
- 'Strophomena striata is recombined as Amphistrophia striata'
- 'Strophomena walmstedti is recombined as Megastrophia (Protomegastrophia) walmstedti'
- 'Strophomenidae belongs to Strophomenacea'
- 'Strophomeninae belongs to Strophomenidae'
- 'Strophonella belongs to Stropheodontidae'
- 'Terebratula barrandii is recombined as Atrypina barrandii'
- 'Terebratula baylei is recombined as Homoeospira baylei'
- 'Terebratula bicarinata is recombined as Protozeuga bicarinata'
- 'Terebratula bidentata is recombined as Rhynchonella bidentata' according to Lindström 1861
- 'Terebratula bidentata belongs to Terebratula' according to Hisinger 1827
- 'Terebratula capewellii is recombined as Dictyonella capewellii'
- 'Terebratula crispa is recombined as Howellella crispa'
- 'Terebratula cuneata is recombined as Rhynchotreta cuneata'
- 'Terebratula cuneata is recombined as Rhynchotreta cuneata'
- 'Terebratula deflexa is recombined as Anastrophia deflexa'
- 'Terebratula didyma is recombined as Didymothyris didyma'
- 'Terebratula diodonta is recombined as Leleshusia diodonta'
- 'Terebratula grayii is recombined as Streptis grayii'
- 'Terebratula imbricata is recombined as Plectatrypa imbricata'
- 'Terebratula laeviuscula is recombined as Glassina laeviuscula'
- 'Terebratula marginalis is recombined as Spirigerina marginalis'
- 'Terebratula navicula is recombined as Dayia navicula'
- 'Terebratula nucula is recombined as Microsphaeridiorhynchus nucula'
- 'Terebratula obtusa is recombined as Meristina obtusa'
- 'Terebratula stricklandii is recombined as Trigonirhynchia stricklandii'
- 'Terebratula stricklandii belongs to Terebratula' according to Sowerby and Murchison 1839
- 'Terebratula stricklandii is recombined as Rhynchonella stricklandii' according to Davidson 1867
- 'Terebratula wilsoni is recombined as Sphaerirhynchia wilsoni'
- 'Terebratulites biforatus is recombined as Platystrophia biforata'
- 'Trigonirhynchia belongs to Trigonirhynchiidae'
- 'Trigonirhynchiidae belongs to Rhynchonellacea'
- 'Triplesidae belongs to Triplesiacea'
- 'Triplesiidae belongs to Triplesiacea'
- 'Uncinulidae belongs to Rhynchonellacea'
- 'Uncinulina fallaciosa is recombined as Trigonirhynchia fallaciosa'
- 'Valdaria belongs to Chilidiopsidae'
- 'Visbyella belongs to Resserellinae'
- 'Whitfieldella belongs to Hindellinae'